Hydraulic pushing and sliding device for transformer and sliding installation method thereof

Abstract

The application relates to a hydraulic pushing and sliding device for a transformer, which comprises a steel rail, a plurality of tilt arranged retreat stop teeth are arranged at equal intervals on both sides of the steel rail, the retreat stop teeth are provided with a first retreat stop surface facing a forward direction of the transformer and a first tilt surface deviating from the forward direction of the transformer; a cylinder base is movably installed on the steel rail, a plurality of retreat stop blocks matched with the retreat stop teeth are arranged in the cylinder base and located at both sides of the steel rail, and the retreat stop blocks are rotatably installed in the cylinder base; the cooperation structure of the retreat stop blocks and the retreat stop teeth can make the cylinder base have the functions of forward movement unlocking and backward movement locking; when the hydraulic cylinder pushes the sliding base to advance, the cylinder base can be automatically unlocked under the action of the retreat stop blocks and the retreat stop teeth; when the hydraulic cylinder is contracted or the transformer has a back-off trend, the first retreat stop surface and the second retreat stop surface of the retreat stop blocks and the retreat stop teeth are matched with each other, thereby forming a retreat stop effect and preventing the cylinder base from moving backward.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electrical equipment push sliding installation, in particular to a hydraulic push sliding device for transformer and a sliding installation method thereof. BACKGROUND

[0002] As a key equipment in the power system, large transformers are widely used in power plants, substations and other places to realize voltage step-up, step-down and long-distance transmission. Due to the large volume and great weight of large transformers, external auxiliary equipment is usually needed in the installation and positioning process. The existing installation methods mainly include hoisting method and sliding method, among which the hoisting method needs large lifting equipment, is greatly limited by site conditions, and has high safety risk; the sliding method relies on laying tracks on the foundation, and through the pushing and pulling action of hydraulic cylinders or winches, the transformer is slowly moved along the track, and the positioning accuracy is high, so it is widely used in actual engineering.

[0003] However, the existing sliding device still has some deficiencies. Specifically, the existing sliding device usually needs to use special clamping pincers to fix the track, and some schemes use hydraulic clamping to fix the track, but this means that an additional hydraulic clamping system must be provided, which not only increases the equipment cost, but also increases the complexity of the structure. At the same time, this clamping method relies on static friction to resist external force, which is prone to slipping under high load conditions, resulting in safety hazards and installation risks of the transformer during the sliding process, which is not conducive to the efficient and reliable positioning of the transformer. The existing sliding device for transformer installation has the problems of high safety risk, high operation difficulty and high cost. SUMMARY

[0004] In order to solve the problems of high cost, easy slipping during clamping and safety hazards in the installation method of the existing sliding device proposed in the background, the present application provides a hydraulic push sliding device for transformer and a sliding installation method thereof.

[0005] The hydraulic push sliding device for transformer and the sliding installation method thereof provided by the present application adopt the following technical solutions:

[0006] A hydraulic push sliding device for transformer, comprising:

[0007] A steel rail, a plurality of inclined stop teeth are arranged at equal intervals on both sides of the steel rail, the stop teeth have a first stop surface facing the forward direction of the transformer and a first inclined surface facing away from the forward direction of the transformer;

[0008] The cylinder base is movably mounted on the rail, a plurality of retreat-stop blocks matched with the retreat-stop teeth are arranged inside the cylinder base and at positions on both sides of the rail, the retreat-stop blocks are rotatably mounted inside the cylinder base, the retreat-stop blocks are provided with second inclined surfaces on the sides facing the advancing direction of the transformer and are provided with second retreat-stop surfaces on the sides away from the advancing direction of the transformer, and the second retreat-stop surfaces and the second inclined surfaces are arranged in an inclined manner in the vertical direction; when the transformer moves forward, the first retreat-stop surface and the second retreat-stop surface are in contact to form locking, and at the same time, the second retreat-stop surface can slide downward relative to the rail to lock the cylinder base on the rail; when the transformer is stationary and the cylinder base moves forward, the first inclined surface and the second inclined surface are in contact to form unlocking, and the second inclined surface can slide upward relative to the rail to reduce the frictional resistance between the cylinder base and the rail.

[0009] The hydraulic cylinder is hingedly arranged at the front end position of the cylinder base.

[0010] The sliding base is hingedly arranged at the end position of the telescopic rod of the hydraulic cylinder and is in sliding cooperation with the rail.

[0011] By adopting the above technical scheme, the cooperation of the retreat-stop blocks and the retreat-stop teeth can make the cylinder base have the functions of unlocking when moving forward and locking when moving backward, thereby replacing the traditional locking by hydraulic clamping, reducing the cost, simplifying the overall structure of the cylinder base, avoiding the problem of low service life caused by frequent work conversion of the clamping type scheme, and the like. In addition, the retreat-stop blocks and the retreat-stop teeth are designed in an inclined structure, which can prevent the cylinder base from moving backward during the transformer jacking process on the one hand, and when the first retreat-stop surface and the second retreat-stop surface are in contact and are subjected to force, the cylinder base can move downward to form a surface contact between the cylinder base and the rail, thereby further utilizing the static friction to prevent the cylinder base from moving backward, making the overall force of the cylinder base uniform, the structure stable, and the locking effect better, and the like. On the other hand, when the cylinder base needs to move forward, since the sliding base at the end of the transformer has a large friction with the rail, the hydraulic cylinder only needs to be retracted to drive the cylinder base to complete unlocking, the second inclined surface and the first inclined surface can convert the force into a component force upwardly during the interaction, preventing the cylinder base from being in contact with the rail to generate friction and preventing the cylinder base from generating resistance to forward movement, thereby ensuring smooth forward movement of the cylinder base during jacking.

[0012] Optionally, the middle position of the cylinder base is provided with a first sliding groove, the profile of the first sliding groove is consistent with the profile of the upper part of the rail, and the top wall and the two side walls of the first sliding groove are both provided with gaps with the rail.

[0013] By adopting the technical scheme, the gap between the first sliding groove top wall and the rail is formed to enable the cylinder seat to form a space for up-down movement in the vertical direction, so that the cylinder seat is in contact with the rail to lock the cylinder seat when the retreat is stopped, and the cylinder seat is not in contact with the rail to facilitate the forward movement of the cylinder seat when the retreat is not stopped; and the gaps provided on the two side walls of the first sliding groove are mainly used for installing the second rollers to enable the cylinder seat to be limited in the left-right direction by rolling of the second rollers to prevent the cylinder seat from deviating.

[0014] Optionally, a plurality of first rollers capable of lifting are arranged at an upper position inside the first sliding groove, and the first rollers are capable of being in contact with the upper surface of the rail.

[0015] By adopting the technical scheme, the first rollers can be in rolling contact with the upper surface of the rail to prevent the cylinder seat from being in contact with the rail to generate resistance, and facilitate the forward movement of the cylinder seat; and the first rollers are designed as a lifting structure to enable the cylinder seat to move downward and be in contact with the rail during the retreat stopping process.

[0016] Optionally, vertical second sliding grooves are arranged at both sides of the inside of the cylinder seat, sliding blocks are slidably connected in the second sliding grooves, the first rollers are installed on the sliding blocks at both sides through bearings, springs are connected to the upper ends of the sliding blocks, threaded holes communicating with the second sliding grooves are formed in the upper part of the cylinder seat, plugs are installed at the threaded holes, and the upper ends of the springs abut against the lower ends of the plugs.

[0017] By adopting the technical scheme, the lifting effect of the first rollers is achieved; when the cylinder seat is in the forward movement state, the elastic force of the spring can drive the first rollers to be in contact with the surface of the rail while enabling the surface of the rail to be separated from the top wall of the first sliding groove of the cylinder seat, thereby avoiding the problem that the forward movement of the cylinder seat is blocked due to sliding friction; and the initial pre-pressing force of the spring can be adjusted by installing the plug in the upper part of the cylinder seat to meet the requirements of different occasions.

[0018] Optionally, a plurality of second rollers capable of rotating are arranged at both sides of the inside of the first sliding groove along the length direction of the first sliding groove, and the second rollers are in rolling cooperation with the rail.

[0019] By adopting the technical scheme, the second rollers are specifically in contact with the two side surfaces of the upper part of the rail, which can reduce the frictional resistance and guide the movement of the cylinder seat to avoid deviation of the cylinder seat during the movement.

[0020] Optionally, the retreat stopper is installed at the inside of the cylinder seat through a pin shaft, a limiting surface is arranged on the side of the retreat stopper close to the second inclined surface, a baffle is fixed at the inside of the cylinder seat, a blocking surface is arranged at the end of the baffle and is in abutment with the limiting surface, a torsional spring is installed on the pin shaft, and the torsional spring makes the limiting surface in contact with the blocking surface in the non-working state.

[0021] By adopting the technical scheme, the contact between the blocking surface on the baffle and the limiting surface on the retreat-stop block can ensure stable force of the retreat-stop block during the retreat-stop process of the cylinder seat.

[0022] Optionally, the surface position of the second retreat-stop surface is provided with a plurality of grooves.

[0023] By adopting the technical scheme, the grooves are mainly provided to reduce the contact area between the second retreat-stop surface and the first retreat-stop surface, and reduce the friction, so that the retreat-stop block can drive the cylinder seat to move downward while forming the retreat-stop effect.

[0024] Optionally, the friction plate is fixed on the cylinder seat and located at the inner top wall position of the first sliding groove, and the friction plate can contact the upper surface of the steel rail when the hydraulic cylinder pushes the transformer.

[0025] By adopting the technical scheme, the friction plate can provide greater friction when the cylinder seat moves downward and contacts the steel rail, so as to further improve the locking effect of the cylinder seat on the steel rail.

[0026] Optionally, the inner part of the sliding base is provided with a third sliding groove which is convenient for the steel rail to pass through and the profile of which is consistent with the profile above the steel rail, the inner top wall position of the third sliding groove is provided with an oil groove which is concave, an oil hole is formed at the root position of the oil groove, the inner cavity of the oil hole is communicated with the pipe joint outside the sliding base, and a sensor for detecting the distance between the cylinder seat and the sliding base is installed at the end position of the cylinder seat or the sliding base.

[0027] By adopting the technical scheme, the lubricating oil can be introduced into the oil groove from the oil hole when the sliding base is driven to slide forward, and under the condition of pressurization, a layer of static pressure oil film is formed between the sliding base and the surface of the steel rail, so as to prevent the situation that the sliding base cannot move due to the heavy weight of the transformer; the sensor is mainly used for detecting the distance between the cylinder seat and the sliding base, that is, detecting the state of the telescopic rod of the hydraulic cylinder, for example, when the telescopic rod is elongated to the limit position, the cylinder seat needs to be moved forward, at this time, the lubricating oil below the sliding base is not pressurized, so that the sliding base and the steel rail have greater static friction, and when the telescopic rod is shortened to the limit position, the sliding base needs to be moved forward, at this time, the lubricating oil is pressurized, so that the lubricating oil film is formed between the sliding base and the steel rail, and the sliding base is convenient to move forward.

[0028] The application further provides a hydraulic pushing and sliding method for a transformer, which is applied to the hydraulic pushing and sliding device and comprises the following steps.

[0029] Step one, preliminary work: complete the incoming inspection of the transformer, check the integrity of the equipment, level and clean the site, and ensure the stability of the foundation;

[0030] Step two, preliminary positioning: build a sleeper on the ground, hoist the transformer to the sleeper, form a gap between the transformer and the ground, and adjust the position of the transformer to preliminarily align the center line of the transformer with the center line of the foundation;

[0031] Step three, hydraulic jacking: set a hydraulic jack at the bottom of the transformer, and jack up the transformer to a specified height;

[0032] Step four, construction of the hydraulic jacking and sliding device: at least two steel rails are arranged in parallel at the bottom of the transformer and extend towards the foundation, a slide and a cylinder seat are sequentially installed on the steel rails, a hydraulic cylinder is connected to the ends of the slide and the cylinder seat, the hydraulic jack is lowered, and the transformer is placed above the slide;

[0033] Step five, sliding operation: start the hydraulic cylinder, the hydraulic cylinder drives the slide to move along the length direction of the steel rail, in the process of moving the slide, the cylinder seat is restricted from moving backward by the backstop block and the backstop teeth on both sides of the steel rail, and the cylinder seat is driven to move downward due to the inclined arrangement of the first backstop surface on the backstop teeth and the second backstop surface on the backstop block, so that the cylinder seat is tightly locked on the steel rail; when the telescopic rod of the hydraulic cylinder is telescoped to the limit position, the hydraulic cylinder is retracted, the cylinder seat is moved forward, and after moving to a specified position, the movement of the cylinder seat is restricted by the cooperation of the first backstop surface and the second backstop surface, the hydraulic cylinder continues to drive the transformer to move forward, and the process is repeated until the transformer moves above the foundation;

[0034] Step six, transformer installation: after the transformer moves to the position above the foundation, the transformer is jacked up again by the hydraulic jack, the hydraulic jacking and sliding device is sequentially removed, the hydraulic jack is lowered, the transformer contacts the foundation, and the transformer is locked on the foundation, completing the installation process.

[0035] By adopting the above technical scheme, the installation environment and position accuracy of the transformer can be ensured in the preliminary positioning stage; during the jacking and sliding device construction process, the transformer is smoothly transferred above the slide, reducing the risk of hoisting; during the sliding operation, the cylinder seat has the functions of forward movement unlocking and backward movement locking by the inclined cooperation of the backstop block and the backstop teeth, so that reliable limiting can be realized without additional hydraulic clamping system, which simplifies the structure, reduces the cost, and avoids the risk of slipping caused by friction clamping; at the same time, under the reciprocating extension and retraction of the hydraulic cylinder, the transformer can realize step-by-step smooth sliding, avoid lateral deviation, and improve the safety and accuracy of the moving process; finally, the transformer can be precisely installed by jacking up and landing again after the transformer reaches above the foundation, thereby significantly improving the sliding installation efficiency and reliability of the large transformer.

[0036] In summary, the present application has at least one of the following beneficial technical effects:

[0037] The cooperation structure of the retreat block and the retreat tooth can make the cylinder seat have the functions of forward movement unlocking and backward movement locking. When the hydraulic cylinder pushes the sliding seat forward, the cylinder seat can be automatically unlocked under the action of the retreat block and the retreat tooth. When the hydraulic cylinder is retracted or the transformer has a backward trend, the first retreat surface and the second retreat surface of the retreat block and the retreat tooth cooperate with each other, thereby forming a retreat effect and preventing the cylinder seat from moving backward. Compared with the traditional limiting mode relying on the hydraulic clamping device, the structure does not need to additionally set the hydraulic clamping system, reduces the device cost, simplifies the structure, and effectively avoids the slipping risk caused by the clamping mode relying on static friction.

[0038] The inclined structure design of the retreat block and the retreat tooth is adopted in the application. In the retreat process, the first retreat surface and the second retreat surface interact with each other, which can drive the cylinder seat to move downward along the vertical direction, so that the cylinder seat forms a surface contact with the steel rail. Through this downward contact mode, not only the friction between the cylinder seat and the steel rail is improved, but also the locking effect of the retreat is further enhanced. In addition, the overall force of the cylinder seat is more uniform and stable, and the problems of local wear and instability caused by single-point force are avoided. At the same time, when forward movement is needed, the inclined surface of the retreat block and the retreat tooth can convert the force into a guide component force, thereby reducing the forward resistance and ensuring smooth forward movement of the cylinder seat during the jacking process.

[0039] The oil groove and the oil hole are arranged in the sliding seat to facilitate the introduction of lubricating oil. During the hydraulic jacking process, a layer of static pressure oil film can be formed between the steel rail and the sliding seat, so that the sliding seat can smoothly move without being affected by the weight of the transformer. In addition, the distance measuring sensor is installed at the end of the cylinder seat or the sliding seat, which can detect the extension and retraction state of the hydraulic cylinder extension rod and the distance between the cylinder seat and the sliding seat in real time. When the hydraulic cylinder is extended to the limit position, the working state of the cylinder seat and the sliding seat can be switched in time, which is beneficial to improve the intelligence and safety of the sliding installation process. BRIEF DESCRIPTION OF DRAWINGS

[0040] Figure 1 is a perspective view of the application;

[0041] Figure 2 is a perspective view of the steel rail of the application;

[0042] Figure 3 is a structure view of the retreat tooth and the retreat block on the steel rail of the application;

[0043] Figure 4 is a perspective view of the cylinder seat of the application;

[0044] Figure 5 is a perspective view of the cylinder seat of the application;

[0045] Figure 6 is a transverse sectional view of the cylinder seat of the application;

[0046] Figure 7 is a longitudinal sectional view of the cylinder seat of the present application;

[0047] Figure 8 is a perspective view of the retreat block of the present application;

[0048] Figure 9 is a perspective view of the slide seat of the present application;

[0049] Figure 10 is a bottom view of the cylinder seat of the present application.

[0050] Explanation of reference signs:

[0051] 1, steel rail; 101, retreat tooth; 1011, first retreat surface; 1012, first inclined surface;

[0052] 2, cylinder seat; 201, first roller; 202, second roller; 203, retreat block; 2031, second retreat surface; 2032, second inclined surface; 2033, groove; 2034, limiting surface; 204, friction plate; 205, first sliding groove; 206, sliding block; 207, second sliding groove; 208, spring; 209, threaded hole; 210, plug; 211, baffle; 212, pin shaft; 213, blocking plane;

[0053] 3, hydraulic cylinder;

[0054] 4, slide seat; 401, third sliding groove; 402, oil groove; 403, oil hole; 404, pipe joint. DETAILED DESCRIPTION

[0055] The present application will be further described in detail below with reference to the accompanying drawings.

[0056] As shown in Figures 1-10 , the embodiment of the present application discloses a hydraulic pushing and sliding device for a transformer, which comprises:

[0057] A steel rail 1, a plurality of retreat teeth 101 are arranged at equal intervals on both sides of the steel rail 1 in an inclined manner, wherein the overall inclined direction of the retreat tooth 101 is inclined backward from top to bottom, that is, the upper end of the retreat tooth 101 is close to the direction of the forward movement of the transformer, and the lower end is away from the direction of the forward movement of the transformer, and the specific inclination angle is inclined backward by 5°-15° relative to the vertical line, the retreat tooth 101 has a first retreat surface 1011 facing the forward movement direction of the transformer and a first inclined surface 1012 away from the forward movement direction of the transformer; in this example, the steel rail 1 adopts a P-shaped steel rail 1, and the retreat tooth 101 can be fixed to both sides of the steel rail 1 by welding;

[0058] The cylinder base 2 is movably mounted on the steel rail 1, and a plurality of retreat-stop blocks 203 matched with the retreat-stop teeth 101 are arranged inside the cylinder base 2 and at positions on both sides of the steel rail 1, the retreat-stop blocks 203 are rotatably mounted in the cylinder base 2, the retreat-stop blocks 203 are provided with second inclined surfaces 2032 on the side facing the advancing direction of the transformer, and are provided with second retreat-stop surfaces 2031 on the side away from the advancing direction of the transformer, and the second retreat-stop surfaces 2031 and the second inclined surfaces 2032 are arranged inclined in the vertical direction; wherein, when the transformer moves forward, the first retreat-stop surfaces 1011 and the second retreat-stop surfaces 2031 are in contact to form locking, and at the same time, the second retreat-stop surfaces 2031 can slide downward relative to the steel rail 1, so as to lock the cylinder base 2 on the steel rail 1; when the transformer is stationary and the cylinder base 2 moves forward, the first inclined surfaces 1012 and the second inclined surfaces 2032 are in contact to form unlocking, and the second inclined surfaces 2032 can slide upward relative to the steel rail 1, so as to reduce the frictional resistance between the cylinder base 2 and the steel rail 1.

[0059] The hydraulic cylinder 3 is hinged at the front end position of the cylinder base 2, specifically, the cylinder body end of the hydraulic cylinder 3 is hinged with the lug at the front end of the cylinder base 2.

[0060] The sliding seat 4 is hinged at the end position of the telescopic rod of the hydraulic cylinder 3, and is in sliding fit with the steel rail 1.

[0061] Specifically, the middle position of the cylinder base 2 has a first sliding groove 205, the profile of the first sliding groove 205 is consistent with the profile of the upper part of the steel rail 1, and the top wall and the two side walls of the first sliding groove 205 are all formed with gaps with the steel rail 1, wherein the cross section of the first sliding groove 205 is wide at the top and narrow at the bottom, so that when the cylinder base 2 is connected with the steel rail 1, the cylinder base 2 can only be mounted on the steel rail 1 from the end of the steel rail 1, so that the cylinder base 2 only has the freedom of moving along the length direction of the steel rail 1, and cannot be separated from the steel rail 1 from the up-down and left-right directions of the steel rail 1, having the functions of limiting and guiding.

[0062] Specifically, the upper position of the interior of the first sliding groove 205 is provided with a plurality of first rollers 201 that can be lifted, in this case, the number of first rollers 201 is two, which are respectively arranged at the front and rear ends of the cylinder seat 2. It can be understood that a different number of first rollers 201 can also be provided. The first roller 201 can be in contact with the upper surface of the steel rail 1. More specifically, the interior of both sides of the cylinder seat 2 is provided with a second sliding groove 207 arranged vertically. The second sliding groove 207 is slidably connected with a sliding block 206. The first roller 201 is mounted on the sliding block 206 on both sides through a bearing. The upper end of the sliding block 206 is connected with a spring 208. A threaded hole 209 is formed in the upper part of the cylinder seat 2 and is in communication with the second sliding groove 207. A plug 210 is installed at the threaded hole 209. The upper end of the spring 208 abuts against the lower end of the plug 210. The cross-sectional shape of the second sliding groove 207 can be designed as T-shaped, swallow-tailed, rectangular, etc. The cross-sectional shape of the sliding block 206 matches the cross-sectional shape of the second sliding groove 207, which is mainly used to prevent the sliding block 206 from rotating in the second sliding groove 207. Specifically, in actual work, the spring 208 exerts a downward force on the sliding block 206, driving the first roller 201 into contact with the surface of the steel rail 1. This can avoid frictional resistance caused by direct contact between the surface of the steel rail 1 and the top wall of the first sliding groove 205, which is conducive to the forward movement of the cylinder seat 2. Secondly, when the cylinder seat 2 moves to a specified position, the cooperation of the first stop surface 1011 and the second stop surface 2031 can drive the cylinder seat 2 to move downward. At this time, the spring 208 is compressed, and the first roller 201 moves upward relative to the cylinder seat 2, so that the cylinder seat 2 comes into contact with the surface of the steel rail 1 to form friction, achieving the effect of locking the cylinder seat 2 on the steel rail 1.

[0063] Specifically, a plurality of second rollers 202 that can rotate are arranged at the positions of both sides of the interior of the first sliding groove 205 along the length direction thereof. The second rollers 202 are in rolling cooperation with the steel rail 1. In this case, two second rollers 202 are respectively arranged at the positions of both sides of the interior of the first sliding groove 205. Similarly, a different number of second rollers 202 can be arranged according to the length of the cylinder seat 2 and actual requirements. The outer wall of the second roller 202 is always in contact with the upper two sides of the steel rail 1, which is used to improve the centering accuracy of the cylinder seat 2 and the steel rail 1, avoid the problem of left and right shaking of the cylinder seat 2, and thus is conducive to improving the reliability, accuracy and stability during the pushing and sliding process of the transformer.

[0064] Specifically, the retreat stop block 203 is installed in the internal position of the cylinder seat 2 through the pin shaft 212, the retreat stop block 203 is provided with a limiting surface 2034 on the side close to the second inclined surface 2032, a baffle 211 is fixed in the internal position of the cylinder seat 2, the baffle 211 is integrally formed with the cylinder seat 2, the end of the baffle 211 is provided with a blocking surface 213 which is in close contact with the limiting surface 2034, the pin shaft 212 is provided with a torsion spring, in the non-working state, the torsion spring makes the limiting surface 2034 in contact with the blocking surface 213, when the cylinder seat 2 moves forward, the first inclined surface 1012 is in contact with the second inclined surface 2032, and the elastic force of the torsion spring is overcome, so that the retreat stop block 203 rotates relative to the center of the rotating shaft, which facilitates the movement of the cylinder seat 2.

[0065] Specifically, the surface position of the second retreat stop surface 2031 is provided with a plurality of grooves 2033, the grooves 2033 are mainly provided to reduce the contact area between the second retreat stop surface 2031 and the first retreat stop surface 1011, and to reduce friction, so that the retreat stop block 203 can drive the cylinder seat 2 to move downward while forming the retreat stop effect.

[0066] Specifically, it also includes a friction plate 204 which is fixed on the cylinder seat 2 and located at the top wall position in the first sliding groove 205, the friction plate 204 can adopt metal-based friction materials such as copper-based and iron-based, which have the characteristics of high strength and wear resistance, and are suitable for occasions with large load and frequent work, when the hydraulic cylinder 3 pushes the transformer, the reaction force applied by the hydraulic cylinder 3 to the cylinder seat 2 makes the retreat stop block 203 and the cylinder seat 2 generate a downward component force under the action of the structure of the first retreat stop surface 1011 and the second retreat stop surface 2031, which can make the friction plate 204 in contact with the upper surface of the rail 1, and increase the friction between the cylinder seat 2 and the rail 1, that is, by using the cooperation of the retreat stop block 203 and the retreat stop teeth 101, and combining the friction plate 204 with the surface of the rail 1, the cylinder seat 2 is locked on the rail 1.

[0067] Specifically, the inside of the sliding seat 4 is provided with a third sliding groove 401 which is convenient for the rail 1 to pass through and has the same profile as the profile above the rail 1, that is, the sliding seat 4 and the rail 1 are in sliding fit, in addition, it can be understood that in other embodiments, roller structures which are in rolling fit with the two sides of the rail 1 can also be arranged at the two side positions in the inside of the sliding seat 4 to guide the sliding seat 4;

[0068] The third sliding groove 401 is provided with an oil groove 402 which is concave in the top wall position, an oil hole 403 is arranged in the root position of the oil groove 402, the inner cavity of the oil hole 403 is in communication with a pipe joint 404 outside the sliding seat 4, the pipe joint 404 is used to connect a lubricating oil pump, the lubricating oil can be introduced into the oil hole 403 through the oil pump, and then into the oil groove 402, so that an oil film can be formed between the sliding seat 4 and the rail 1 to reduce the friction of the sliding seat 4 during movement;

[0069] A sensor for detecting the distance between the cylinder base 2 and the sliding base 4 is installed at the end position of the cylinder base 2 or the sliding base 4, which can be a laser ranging sensor, an infrared ranging sensor, etc. In addition, a control system such as a PLC controller is also included, which is electrically connected with the ranging sensor and the above-mentioned lubricating oil pump. When the ranging sensor detects that the distance between the cylinder base 2 and the sliding base 4 is less than a specified threshold value, i.e. the hydraulic cylinder 3 is in a retracted state, the next step is to push the sliding base 4 forward. At this time, the control system controls the lubricating oil pump to start, and the lubricating oil enters the oil groove 402 and forms a static pressure oil film between the sliding base 4 and the rail 1, reducing the frictional resistance between the sliding base 4 and the rail 1, and the hydraulic cylinder 3 is started to drive the sliding base 4 to move forward. When the ranging sensor detects that the distance between the cylinder base 2 and the sliding base 4 is greater than a specified threshold value, i.e. the hydraulic cylinder 3 is in an extended state, the next step is to move the cylinder base 2 forward. At this time, the control system controls the lubricating oil pump to stop working, and under the action of the gravity of the transformer itself, the friction between the sliding base 4 and the rail 1 increases. At this time, the telescopic rod of the hydraulic cylinder 3 can pull the cylinder base 2 to move forward during the retraction process. This reciprocating process continues until the transformer is pushed to the specified position.

[0070] The embodiment also provides a hydraulic pushing and sliding method for a transformer, which is applied to the above-mentioned hydraulic pushing and sliding device and includes the following steps.

[0071] Step one, preliminary preparation: complete the incoming inspection of the transformer, check the integrity of the equipment, level and clean the site, and ensure the stability of the foundation, wherein the foundation is a pre-formed concrete base;

[0072] Step two, preliminary positioning: build a tie on the ground, hoist the transformer onto the tie, form a gap between the transformer and the ground, and adjust the position of the transformer to preliminarily align the center line of the transformer with the center line of the foundation;

[0073] Step three, hydraulic jacking: set a hydraulic jack at the bottom of the transformer to jack up the transformer to a specified height;

[0074] Step four, construction of the hydraulic pushing and sliding device: arrange at least two rails 1 parallel to each other at the bottom of the transformer, and extend the rails 1 towards the foundation. Install the sliding base 4 and the cylinder base 2 on the rails 1 in sequence, and connect the hydraulic cylinder 3 to the ends of the cylinder base 2 and the sliding base 4. Lower the hydraulic jack to place the transformer above the sliding base 4;

[0075] Step five, sliding operation: start the hydraulic cylinder 3, the hydraulic cylinder 3 drives the sliding seat 4 to move along the length direction of the steel rail 1, in the process of the movement of the sliding seat 4, the cylinder seat 2 is limited to move backward by the stop block 203 and the stop teeth 101 on both sides of the steel rail 1, and the cylinder seat 2 is driven to move downward because the first stop surface 1011 on the stop teeth 101 and the second stop surface 2031 on the stop block 203 are inclined in the vertical direction, so that the cylinder seat 2 is tightly locked on the steel rail 1; when the telescopic rod of the hydraulic cylinder 3 is telescoped to the limit position, the hydraulic cylinder 3 is retracted, the cylinder seat 2 moves forward, and after moving to the specified position, the movement of the cylinder seat 2 is continued to be limited by the cooperation of the first stop surface 1011 and the second stop surface 2031, the hydraulic cylinder 3 continues to drive the transformer to move forward, and so on, until the transformer is moved above the foundation;

[0076] Step six, transformer installation: after the transformer is moved to the position above the foundation, the transformer is lifted again by the hydraulic jack, and the hydraulic thrust sliding device is removed in sequence, the hydraulic jack is lowered, the transformer is in contact with the foundation, and the transformer is locked on the foundation, and the installation process is completed.

[0077] The above are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, therefore: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A hydraulic push sliding device for a transformer, characterized by, The utility model relates to a transformer pushing device, including: A plurality of tilt setting stop teeth (101) are arranged at equal intervals on both sides of the steel rail (1), the stop teeth (101) have a first stop surface (1011) facing the transformer advancing direction and a first inclined surface (1012) away from the transformer advancing direction; A cylinder seat (2) is movably installed on the steel rail (1), a plurality of stop blocks (203) matched with the stop teeth (101) are arranged inside the cylinder seat (2) and at both sides of the steel rail (1), the stop blocks (203) are rotatably installed inside the cylinder seat (2), the stop blocks (203) are provided with a second inclined surface (2032) on the side facing the transformer advancing direction and a second stop surface (2031) on the side away from the transformer advancing direction, and the second stop surface (2031) and the second inclined surface (2032) are arranged in a tilt manner in the vertical direction; when the transformer moves forward, the first stop surface (1011) and the second stop surface (2031) are in contact to form locking, and at the same time, the second stop surface (2031) can slide downward relative to the steel rail (1) to lock the cylinder seat (2) on the steel rail (1); when the transformer is stationary and the cylinder seat (2) moves forward, the first inclined surface (1012) and the second inclined surface (2032) are in contact to form unlocking, and the second inclined surface (2032) can slide upward relative to the steel rail (1) to reduce the frictional resistance between the cylinder seat (2) and the steel rail (1); A hydraulic cylinder (3) is hinged at the front end position of the cylinder seat (2); A sliding seat (4) is hinged at the telescopic rod end position of the hydraulic cylinder (3) and is in sliding cooperation with the steel rail (1).

2. A hydraulic pusher skidding device for a transformer as claimed in claim 1, wherein, The middle position of the cylinder seat (2) is provided with a first sliding groove (205) with a contour consistent with the upper contour of the steel rail (1), and the top wall and the two side walls of the first sliding groove (205) form gaps with the steel rail (1).

3. A hydraulic pusher skidding device for a transformer as claimed in claim 2, wherein, A plurality of first rollers (201) capable of ascending and descending are arranged at the upper position inside the first sliding groove (205), and the first rollers (201) can be in contact with the upper surface of the steel rail (1).

4. A hydraulic pusher skidding device for a transformer as claimed in claim 3 wherein, Second sliding grooves (207) arranged vertically are arranged at both sides of the inside of the cylinder seat (2), sliding blocks (206) are slidably connected in the second sliding grooves (207), the first rollers (201) are installed on the sliding blocks (206) at both sides through bearings, springs (208) are connected to the upper ends of the sliding blocks (206), threaded holes (209) in communication with the second sliding grooves (207) are formed in the upper portion of the cylinder seat (2), plugs (210) are installed at the threaded holes (209), and the upper ends of the springs (208) abut against the lower ends of the plugs (210).

5. A hydraulic push-pull skidding device for transformers as claimed in claim 2 wherein, A plurality of second rollers (202) capable of rotating are arranged at both sides of the inside of the first sliding groove (205) along the length direction, and the second rollers (202) are in rolling cooperation with the steel rail (1).

6. A hydraulic push-pull skidding device for transformers as claimed in claim 1, wherein, The retreat block (203) is installed in the internal position of the cylinder seat (2) through the pin shaft (212), the retreat block (203) is provided with a limiting surface (2034) on the side close to the second inclined surface (2032), a baffle (211) is fixedly arranged in the internal position of the cylinder seat (2), the end of the baffle (211) is provided with a blocking plane (213) abutting with the limiting surface (2034), a torsion spring is arranged on the pin shaft (212), and the limiting surface (2034) is in contact with the blocking plane (213) in the non-working state.

7. A hydraulic push-pull skidding device for transformers as claimed in claim 1 wherein, The surface position of the second retreat surface (2031) is provided with a plurality of grooves (2033).

8. A hydraulic push-pull skidding device for transformers as claimed in claim 2 wherein, The friction plate (204) is fixed on the cylinder seat (2) and located at the top wall position in the first sliding groove (205), and the friction plate (204) can be in contact with the upper surface of the steel rail (1) when the transformer is pushed by the hydraulic cylinder (3).

9. The hydraulic push-pull skidding apparatus for transformers of claim 1, wherein, The inside of the sliding seat (4) is provided with a third sliding groove (401) which is convenient for the steel rail (1) to pass through and the contour of which is consistent with the contour above the steel rail (1), an oil groove (402) is arranged in the top wall position in the third sliding groove (401), an oil hole (403) is arranged at the root position of the oil groove (402), the inner cavity of the oil hole (403) is communicated with the pipe joint (404) outside the sliding seat (4), and a sensor for detecting the distance between the cylinder seat (2) and the sliding seat (4) is arranged at the end position of the cylinder seat (2) or the sliding seat (4).

10. A hydraulic pushing and sliding method for transformer, which applies the hydraulic pushing and sliding device as claimed in any one of claims 1-9, characterized in that, The method comprises the following steps: Step one, preliminary work: complete the incoming inspection of the transformer, check the integrity of the equipment, level and clean the site, and ensure the stability of the foundation; Step two, preliminary positioning: build a sleeper on the ground, hoist the transformer to the sleeper, form a gap between the transformer and the ground, and adjust the position of the transformer to preliminarily align the center line of the transformer with the center line of the foundation; Step three, hydraulic jacking: set a hydraulic jack at the bottom of the transformer, and jack up the transformer to a specified height; Step four, construction of the hydraulic jacking and pushing sliding device: arrange at least two steel rails (1) in parallel at the bottom of the transformer, and extend the steel rails (1) towards the foundation, sequentially arrange the sliding seat (4) and the cylinder seat (2) on the steel rails (1), connect the hydraulic cylinder (3) to the end of the cylinder seat (2) and the sliding seat (4), and drop the hydraulic jack to place the transformer above the sliding seat (4); Step five, sliding operation: start the hydraulic cylinder (3), the hydraulic cylinder (3) drives the sliding seat (4) to move along the length direction of the steel rail (1), in the process of the movement of the sliding seat (4), the retreat block (203) is used to limit the backward movement of the cylinder seat (2) with the retreat tooth (101) on both sides of the steel rail (1), and due to the first retreat surface (1011) on the retreat tooth (101) and the second retreat surface (2031) on the retreat block (203) are obliquely arranged in the vertical direction, so as to drive the cylinder seat (2) to move downward, so that the cylinder seat (2) is tightly locked on the steel rail (1); when the telescopic rod of the hydraulic cylinder (3) is telescoped to the limit position, the hydraulic cylinder (3) is retracted, the cylinder seat (2) is moved forward, and after moving forward to the specified position, the cooperation of the first retreat surface (1011) and the second retreat surface (2031) is continued to limit the movement of the cylinder seat (2), the hydraulic cylinder (3) continues to drive the transformer to move forward, and so on, until the transformer is moved above the foundation; Step six, transformer installation: after the transformer is moved to the position above the foundation, the hydraulic jack is used to lift the transformer again, and the hydraulic thrust sliding device is removed in sequence, the hydraulic jack is lowered, the transformer is in contact with the foundation, and the transformer is locked on the foundation, and the installation process is completed.

Images